. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Atlas of the Rare Vascular Plants of Ontario / Atlas des plantes vasculaires rares de rOntarlo ASTERACEAE Solidago houghtonii T. & G. Houghton's goldenrod Verge d'or de Houghton. HABITAT: Marshy limestone pavements and plains. STATUS: Rare in Canada. Threatened in Michigan and New York. NOTES: This polyploid species may have arisen in the Great Lakes region since déglaciation. It resembles S. ptarmicoides (Nees) Boivin and S. ohioensis Riddell and it has been suggested that it may have come from them through hybridizatio
. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Atlas of the Rare Vascular Plants of Ontario / Atlas des plantes vasculaires rares de rOntarlo ASTERACEAE Solidago houghtonii T. & G. Houghton's goldenrod Verge d'or de Houghton. HABITAT: Marshy limestone pavements and plains. STATUS: Rare in Canada. Threatened in Michigan and New York. NOTES: This polyploid species may have arisen in the Great Lakes region since déglaciation. It resembles S. ptarmicoides (Nees) Boivin and S. ohioensis Riddell and it has been suggested that it may have come from them through hybridization and subsequent chromosome doubling. HABITAT: Lapiés marécageux et plaines. SITUATION: Rare au Canada. Menacée au Michigan et dans l'Etat de New York. REMARQUES: Cette espèce polyploide est peut-être ap- parue dans la région des Grands Lacs après la déglacia- tion. Elle ressemble à S. ptarmicoides (Nees) Boivin et S. ohioensis Riddell et certains pensent qu'elle pourrait dériver de ces espèces par hybridation et duplication chromosomique. REFERENCES / SOURCES Guire, , & Voss. 1963. Distribution of distinctive shoreline plants in the Great Lakes region. Michigan Botanist 2:99-114. Morton, 1979. Observations on Houghton's goldenrod {Solidago houghtonii 1. & G.). Michigan Botanist 18:31-35. Semple, , & Ringius. 1983. The goldenrods of Ontario: Solidago L. and Euthamia Nutt. University of Waterloo Biology Series No. 26. 84 pp. Semple & Ringius 1983. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Argus, George W. (George William); National Museum of Natural Sciences (Canada). Botany Division. Ottawa : Botany Division, National Museum of Natural Sciences = Division de la botanique, Musée national des sciences naturelles
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